Abstract
EFFECT OF ADDING FLY ASH AND POLYCARBOXYLATE IN HIGH EARLY STRENGTH SELF COMPACTING CONCRETE (HESSCC) ON THE 1 (ONE) DAY OLD CONCRETE COMPRESSION STRENGTH
*Ahmad Junaidi and R. Dewo Hiraliya Maesa Hariyanto
ABSTRACT
The purpose of this study was to determine the effect of adding Fly Ash and Polycarboxylate to HESSCC on the compressive strength of the concrete. The percentage of Fly Ash and Polycarboxylate variant ranging of Fly Ash 5% and Polycarboxylate1%, 1.5%, 2%, 2.5%, 3%, 3.5% and 4%. Concrete testing will be done after the concrete has aged 1, 2, 3 and 28 days. This study used 96 cylindrical specimens with a size of 15 cmX15cmX15cm. From the laboratory research, it was found that the compressive strength of concrete at the age of 1 day with Normal Concrete + Fly Ash 5% was 189.36 Kg/Cm?, the highest compressive strength was Normal Concrete + Fly Ash 5% + Polycarboxylate 3 % of 348.42 Kg/Cm? with 99.5% increase from the design compressive strength, for 28 days the initial compressive strength has reached 162.3% of the design strenght or equal to 568.1 Kg/Cm?.
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